The calorimeter pictured below shows the final temperature after calcium chloride was added to water. (The initial temperature was 25°C.) Which of the following best describes what occurred within the calorimeter? A. Only Bond forming occurred

B. The bonds that formed were the most part stronger than the bonds that were broken

C. More energy was absorbed in breaking bonds than was released when new bonds form

D. As the powder dissolved, the breaking of bonds released energy

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6